Drilling-machine



(No Model.) l if 2 Sheets-Sheet 1. A. F. PRENTIGE.

DRILLING MACHINE.

No. 340,615. Patented Apr. 27, 1886.

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` DRILLING MACHINE.

No.,340,615. Patented Apr. 27, 1886.

a E Q I o i h I 7A l'i l si Y e m AK IK UNITED STATES PATENT Ormea.

ALBERT F. PRENTICE, OF VORCSTER, MASSACHUSETTS.

DRlLLlNG-MACHINE.

SPECIFICATION forming part of Letters Patent No. 340,815, dated Aprl27,1886.

Application filed Fehrnaryl, ISSG. Serial No. 192,818.v (No model.)

To all whom, it may concern:

Be it known that l, ALBERT F. PRENTTCE, a citizen of the United States, residing at Vllol'cester, in the county of Toreester and State of Massachusetts, have invented certain new and useful improvements in Upright Drilling-lilachines; and I declare the following to be a description of my said invention sufficiently full, clear, and exact to enable,

others skilled in the art to which it appertains to the accompanying drawings, which form a part of this specification.

The obj ect ot' my present invention is to provide facilities in an upright drilling-machine whereby either the head or the quill cam-at the pleasure of the operator, be putin connection with and operated by the power feeding` mechanism, so that the drilling-tool can be fed up or down by movement of the head or by movement of the quill, or both, as most convenient or desirable for the work. This object I attain by mechanism organized for operation substantially as hereinafter explained,

the particular subject-matter claimed being E hereinafter definitely specified.

In the drawings, Figure 1 is a side view of such parts of an upright drilling-machine as will illustrate the nature of my invention. Fig. 21s a view of the opposite side of the head and quill on a somewhat larger scale. Fig. 3 is a horizontal section through the head, quill, and standard; and Fig. et shows a modiiication of the shifting-gear.

ln reference to parts, A denotes the standard, post, or supportingframe.

' B indicates the head, mounted inthe usual manner upon guideways a on. the front of the frame A, to move up and down thereon.

C indicates the feed-quill, which works up and down through the front part of the head, and supports or carries the drill-spindle D, which latter is constructed and operated in the usual manner, the rotative motion being` imparted thereto by gears D from the shaft The mechanism for driving shaft E, which is not herein shown, may be made ofthe ordinary Well-known construction, as it forms no part of my present invention.

F denotes the feed-shaft,'a1;ranged horizontally across the head B to turn in bearings b b.

l i i l l,

Upon said shaft is mounted the loose-running worm-wheel G, provided with clutch-teeth on its side for locking with the clutch-hub H, which latter is fitted to the shaft with a spline or feather, 7L, to preventiudependent rotation between the shaft and hub, so that when the clutch is thrown in the movement of wheel G will cause the movement of the 'shaft F.

The worm-wheel G is operated by the arm l or serewi on shaft I, in connection with the to make and use thesame, reference beinghad usual well-known devices, such as gears l',

spindle I2, pulleys and gears at I", and the hand-wheel l, as shown. A rack, C', is fixed on the quill C, and a rack, A', is also fixed in or upon the post or frame A. Meshing with the rack C is a gear or pinion, J, rigidly fixed upon or integral with a sleeve, J', that is mounted to turn loose on shaft F, and which sleeve extends through the bearing b in the head B, and is provided at its outer end with a halfclutch or series of teeth that can be engaged with corresponding teeth, or a half clutch upon the end of a longitudinally-movable sleeve, K, mounted on shaft F, and titted thereto with a spline or feather, f, so as to rotate with said shaft. At the outer end of the sleeve K, rigidly fixed upon or integral therewith, is a hub, l, in which are fixed the handlevers L, for turning the shaft when the power devices are not in clutch therewith. A gear, J, is mounted on the sleeve Kin a manner to revolve therewith, which gear can be moved into and out of mesh with an intermediate gearM, supported on a stud, m, at the side ot' the head, as indicated. The gear K may be made longitudinally movable on the sleeve K, and be fitted thereto with a spline or feather, o, to insure simultaneous rotation, as indicated in Fig. 3; or, if preferred, said gear K and sleeve K may be rigidly eonnect ed or formed integral with each other, as indicated in Fig. 1l.

A short shaft, n, is mounted in a suitable bearing in the head B, as indicated. (See Fig. 3.) Upon one end of said shaft is fixed a gear, N, that meshes with the rack A on the upright or frame A, while upon its other end is fixed a gear, 1P, that meshes with the intermediate gear, M.' Any convenient device may be employed on the head for clamping it to the ways a, if desired, or the head may be free IOO to be held by the gear t in the rack A', as shown.

In the operation, assuming the worm-wheel G to be at work or in rotative action, then, by moving hub H into clutch therewith, rotation is imparted to shaft F and sleeve K. Now, if gear K is slipped into mesh with gear M, the motion is transmitted through gears M and P and shaft n to the gear N, which latter, by rolling up or down the rack A', raises or lowers the head B on the upright A, together with the parts connected therewith. If, on the other hand, the gear K' is left out of mesh with M, and the sleeve K is moved into clutch with sleeve J', then motion is imparted to the gear J, which, acting upon the rack C', causes the quill C and drill-spindle D to move up or down, the head B remaining stationary. Again, the parts KV and J being in clutch, and the gear K' slipped into mesh with M, then gear N effects movement of the head,

while gear J effects movement of the quill,v

the feed up or down being thus compound, and the speed consequently doubled. Vith the gear K' integral or fixed on sleeve K this latter operation could not be obtained, as said gear K' would move in or out positively with the clutching-sleeve K.

By the levers L the mechanism can be worked by hand in similar manner to that described, the clutch H being iirst slipped out to release the wheel G.

The head and quill may be provided with a lever counterbalance device, T, arranged to act in the customary manner.

I am aware that drilling-machines have heretofore been made wherein the upright frame is provided with a rack upon which the head is geared; also, that other styles of drilling-machines are provided with feed-racks on the quill. Therefore, I do not herein claim such construction, broadly. So far as I am aware, however, none of the former drilling-machines have combined therewith devices for interchangeably feeding by the head or the quill at will.

What I claim as of my invention, and desire to secure by Letters Patent, is-

1. An upright drilling-machine provided with feed-racks, both Von the upright frame and the quill, in combination with operatinggearing and shifting-clutches mounted in connection with the head, and connecting said racks with the power feed-shaft, substantially as hereinbefore described, whereby automatic feeding of the drill is interchangeably effected either by action of the head upon the upright or by action of the quill in the head, as set forth.

2. 'lhe combination, with the drill-spindle, quill C, having rack C', upright frame A, having rack A', and head B, of the shaft F, the clutch-sleeve J', carrying gear J, loose on said shaft, the clutch-sleeve K, splined to said shaft.

and having a gear, K', mounted thereon, the gear N, meshing with rack A', the shaft n, and the gears Fand M, substantially as and for the purposes set forth.

3. The combination, with the gears M, I), and N and shaft F, of the sleeve K, fitted on said shaft with a spline,f, and the gear K', longitudinally movable upon and fitted to said sleeve by a spline, c, substantially as and for the purpose described.

4. In combination, substantially as described, the head B, drill-spindle D, quill C, with rack C', the Worm-Wheel yGr, clutch-hub H, shaft F, clutch-sleeve J', with gear J, clutch-sleeve K, gear K', hand-levers L. gears M, P, and N, shaft n, and rack A', substantially as and for the purposes set forth.

Witness my hand this 17th day of February, A. D. 1886.

ALBERT F. PRENTICE.

Witnesses:

OHAs. H. BURLEIGH, FRED H. DANIELs. 

